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Table B-18. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Selected NAICS (1) Code and Mode of Transportation for the United States: 2012

Monday, July 13, 2015

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(Estimates are based on data from the 2012 Commodity Flow Survey)

NAICS code NAICS title Value Tons Ton-miles (2)
Coefficient of variation of number Standard error of percent of total Coefficient of variation of number Standard error of percent of total Coefficient of variation of number Standard error of percent of total
  All Sectors
  All modes 3.1 0.0 3.7 0.0 6.2 0.0
  Single modes 3.1 0.2 3.7 0.3 6.0 3.4
  Truck (3) 3.6 1.8 3.7 2.1 6.0 1.5
   For-hire truck 4.5 2.2 4.9 2.2 5.0 1.3
   Private truck 7.6 1.3 7.5 1.4 11.2 1.0
  Rail 7.7 0.2 6.2 0.2 6.9 1.9
  Water 24.3 2.0 28.2 2.6 17.4 2.6
   Inland water 26.3 1.7 30.6 2.3 28.7 2.4
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea 38.0 0.5 36.9 0.6 36.7 2.0
   Multiple waterways 44.0 0.4 42.7 0.4 43.8 2.3
  Air (includes truck and air) 12.8 Z 29.3 Z 38.4 Z
  Pipeline (4) 9.3 2.0 11.0 2.3 S S
  Multiple modes 15.6 0.2 30.9 0.3 45.8 3.4
  Parcel, U.S. Postal Service, or courier 11.0 0.1 9.0 Z 10.4 Z
  Truck and rail 14.5 0.1 15.6 0.1 14.0 0.8
  Truck and water S S S S S S
  Rail and water 30.6 Z 42.5 0.1 33.3 0.2
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0
324 Petroleum and Coal Products Manufacturing
  All modes 4.6 0.0 4.7 0.0 14.4 0.0
  Single modes 4.5 0.4 4.4 0.6 9.2 6.2
  Truck (3) 7.0 1.0 7.4 1.2 6.6 1.5
   For-hire truck 7.6 1.0 7.7 1.1 8.4 1.4
   Private truck 14.2 0.6 15.2 0.8 16.8 0.4
  Rail 13.2 0.3 9.8 0.3 16.2 2.1
  Water 15.1 2.4 14.7 2.3 24.1 6.2
   Inland water 19.5 2.3 19.2 2.4 41.7 4.9
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea 38.0 1.4 37.8 1.3 44.0 4.7
   Multiple waterways 20.8 2.1 16.4 2.0 24.6 12.0
  Air (includes truck and air) S S S S S S
  Pipeline (4) 5.9 2.3 6.0 2.4 S S
  Multiple modes S S S S S S
  Parcel, U.S. Postal Service, or courier 32.6 Z 31.9 Z 22.3 Z
  Truck and rail S S S S S S
  Truck and water S S S S S S
  Rail and water 36.7 0.1 43.5 0.3 31.7 1.2
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0
325 Chemical Manufacturing
  All modes 5.8 0.0 6.0 0.0 7.8 0.0
  Single modes 5.9 0.7 6.1 0.9 9.0 2.0
  Truck (3) 3.7 2.7 3.7 2.4 5.4 1.6
   For-hire truck 4.9 2.6 4.7 1.6 5.5 1.3
   Private truck 8.2 0.7 5.1 1.2 5.6 0.3
  Rail 9.6 1.6 10.3 1.9 9.2 2.9
  Water 18.4 1.6 17.3 2.1 34.0 2.7
   Inland water 20.5 1.6 19.1 2.2 43.5 2.7
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea 34.8 0.5 27.2 0.7 33.3 1.8
   Multiple waterways 43.5 0.7 48.5 0.5 31.6 0.4
  Air (includes truck and air) 10.8 0.1 44.6 Z 37.9 Z
  Pipeline (4) 16.4 1.2 13.9 1.1 S S
  Multiple modes 15.5 0.7 17.5 0.9 15.6 2.0
  Parcel, U.S. Postal Service, or courier 12.5 0.1 20.5 Z 20.4 Z
  Truck and rail 17.5 0.7 18.0 0.9 16.1 2.0
  Truck and water 34.6 Z 45.5 Z 32.8 0.1
  Rail and water 47.3 0.4 44.8 0.4 S S
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0
424 Merchant Wholesalers, Nondurable Goods
  All modes 4.6 0.0 5.5 0.0 10.5 0.0
  Single modes 4.6 0.2 5.5 0.2 10.7 0.3
  Truck (3) 5.2 3.8 5.2 5.0 9.4 2.8
   For-hire truck 6.2 3.6 6.7 4.3 7.6 3.1
   Private truck 9.0 2.5 9.7 3.0 16.5 4.3
  Rail 23.2 0.1 18.1 0.1 17.8 1.6
  Water S S S S S S
   Inland water S S S S S S
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea S S S S S S
   Multiple waterways 0.0 0.0 0.0 0.0 0.0 0.0
  Air (includes truck and air) 44.2 Z S S S S
  Pipeline (4) S S S S S S
  Multiple modes 24.5 0.2 S S 27.4 0.3
  Parcel, U.S. Postal Service, or courier 24.1 0.1 19.0 Z 39.4 Z
  Truck and rail 26.3 Z 25.4 Z 34.9 0.3
  Truck and water S S S S S S
  Rail and water 0.0 0.0 0.0 0.0 0.0 0.0
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0
4246 Chemical and Allied Products Merchant Wholesalers
  All modes 10.6 0.0 12.7 0.0 10.9 0.0
  Single modes 10.6 0.4 12.8 Z 11.0 0.3
  Truck (3) 10.9 0.9 13.7 1.4 15.5 5.2
   For-hire truck 15.1 2.7 16.1 2.7 19.8 5.4
   Private truck 11.3 2.6 16.1 2.9 21.9 5.4
  Rail 41.4 0.5 17.1 1.4 18.6 5.1
  Water S S S S S S
   Inland water 0.0 0.0 0.0 0.0 0.0 0.0
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea S S S S S S
   Multiple waterways 0.0 0.0 0.0 0.0 0.0 0.0
  Air (includes truck and air) 49.7 0.4 45.8 Z S S
  Pipeline (4) 46.9 0.1 10.9 1.0 S S
  Multiple modes S S 42.8 Z S S
  Parcel, U.S. Postal Service, or courier S S S S S S
  Truck and rail S S S S S S
  Truck and water S S S S S S
  Rail and water 0.0 0.0 0.0 0.0 0.0 0.0
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0
4247 Petroleum and Petroleum Products Merchant Wholesalers
  All modes 5.1 0.0 5.9 0.0 10.5 0.0
  Single modes 5.2 0.2 5.9 0.2 10.6 0.3
  Truck (3) 5.5 4.0 5.3 5.2 11.7 2.5
   For-hire truck 6.5 3.9 6.8 4.5 9.9 3.5
   Private truck 9.9 2.5 10.1 2.8 18.7 5.0
  Rail 20.5 Z 21.5 0.1 22.6 1.1
  Water S S S S S S
   Inland water S S S S S S
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea S S S S S S
   Multiple waterways 0.0 0.0 0.0 0.0 0.0 0.0
  Air (includes truck and air) S S S S S S
  Pipeline (4) S S S S S S
  Multiple modes S S S S 29.2 0.3
  Parcel, U.S. Postal Service, or courier S S S S S S
  Truck and rail 38.4 Z 32.0 Z 33.2 0.4
  Truck and water S S S S S S
  Rail and water 0.0 0.0 0.0 0.0 0.0 0.0
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0
4931 Warehousing and Storage
  All modes 31.1 0.0 34.3 0.0 21.3 0.0
  Single modes 31.1 0.1 34.3 0.3 21.5 0.7
  Truck (3) 31.5 3.3 34.9 7.1 25.2 9.1
   For-hire truck 34.9 5.4 36.5 8.1 25.1 7.2
   Private truck 32.8 6.4 37.4 9.8 30.0 9.4
  Rail S S 46.2 4.6 S S
  Water S S S S S S
   Inland water S S S S S S
   Great Lakes 0.0 0.0 0.0 0.0 0.0 0.0
   Deep sea S S S S S S
   Multiple waterways 0.0 0.0 0.0 0.0 0.0 0.0
  Air (includes truck and air) 48.3 Z S S S S
  Pipeline (4) 43.6 3.4 31.0 7.4 S S
  Multiple modes 27.0 0.1 47.2 0.3 44.3 0.7
  Parcel, U.S. Postal Service, or courier 28.9 0.1 22.6 Z 37.9 Z
  Truck and rail 42.1 0.2 47.8 1.3 47.8 1.3
  Truck and water S S S S S S
  Rail and water 0.0 0.0 0.0 0.0 0.0 0.0
  Other multiple modes 0.0 0.0 0.0 0.0 0.0 0.0
  Other modes 0.0 0.0 0.0 0.0 0.0 0.0

KEY: S = Withheld because estimate did not meet publication standards.

Z = Rounds to zero.

(1) NAICS codes shown had the highest estimated weight without considering sampling variability and are shown in descending order.

(2) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.

(3) “Truck” as a single mode includes shipments that were made by only private truck or only for-hire truck.

(4) Estimates for pipeline exclude shipments of crude petroleum (SCTG 16).

NOTES: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design and definitions. Links to this information on the Internet may be found at <www.census.gov/econ/cfs>.

NAICS codes shown are those covered in the Commodity Flow Survey.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2012 Economic Census: Transportation Commodity Flow Survey, December 2014.